Air separator



Oct. 16, 1934. E 1,977,539

AIR SEPARATOR Original Filed March 14, 1932 J Hube.

Patented Oct. 16, 1934 NETED STATES PATENT FFHCIE AIR SEPARATOR Jean Aub, Paris, France, assignor, by mesne assignments, to The Buell Combustion Company Limited, Aldwich-London, England Original application March 14, 1932, Serial No. 598,861. Divided and this application February 10, 1933, Serial No. 656,169. In France Novemher 3, 1931 1 Claim.

The present invention has for'its object improvements in pulverizers, particularly in coal pulverizers. These improvements relate to the selector which is mounted at the outlet of the crushing chamber, and automatically ensures the separation of the products driven out of the said chamber by an air stream, directs the sufficiently crushed particles towards the discharge conduit of the crusher and sends back to the crushing chamber those which are not yet crushed.

The present invention is a divisional of my co-pending application 598,861 filed March 14, 1932.

According to the invention, movable walls are provided at the upper part of the selector, these walls being so devised as to allow of varying the cross section of the outlet conduit for the air stream carrying away the crushed products, and, consequently, the speed of this air stream and the fineness of the products carried away, so that it is possible to easily and rapidly control the speed of operation of the pulverizer.

These movable walls are moreover so shaped as to give to the said outlet conduit such a profile that the crushed products are carried away in the best conditions of efficiency.

The acompanying drawing, given by way of example only, is a diagrammatic vertical section of a form of carrying out the invention.

The selector illustrated is provided with a flue 27 in communication with the crushing chamber C.

This flue is provided with side slits 33 and, above its orifice, is mounted a plate 34 having flanges 35. Through this flue passes an air stream carrying away the products issuing from the chamber C, and the said fiue automatically ensures, in the known manner, the separatio of these products. I

According to the invention, on either side of the upper part of this flue are mounted two sheet metal plates 69, '70 jointed together at X according to their common edge seen endwise.

The sheet metal plate 69 is, on the other hand, pivotally mounted about a fixed axis, seen endwise at Y, and any suitable transmission (not shown) actuated by means of an operating lever 71, allows of modifying its setting.

A graduated sector, opposite which the lever 71 moves, allows of adjusting this setting.

A link '72 is, on the other hand, pivotally connected to the sheet metal plate '70, at 72a, and pivots about a fixed axis Z. The assembly is so arranged that the points X, Y, Z, 72a are located at the apices of a parallelogram, so that the sheet metal plate '70 is always compelled to remain parallel to the plane of the two axes Y, Z, this plane being preferably vertical.

The air stream which carries away the crushed products from the pulverizer, passes through the conduits '73 existing between the sheet metal plates 35 and 69-70, and, by modifying the setting of the sheet metal plate 69, the cross section of these conduits are caused to vary, and, consequently, the speed of the air stream and the size of the particles carried away are also caused to vary.

What is claimed is,

In an'automatic selector for pulverizers, the combination of an outer casing, a flue arranged in this casing, extending from the pulverizer and in which circulates a mixtureof air and solid particles, a deflecting plate above this flue, fixed partitions on the edges of the said deflecting plate and arranged for directing downwardly the gaseous stream issuing from the said flue, a stack at the top of the said casing, movable walls pivoted at their upper edge on the said casing and arranged for constituting with the said deflecting plate channels of adjustable cross section, guide shutters pivoted on the lower edge of the said movable walls, links pivoted at their upper end to fixed points and, at their lower end, on the respective guide shutters, these links being adapted to maintain the said guide shutters always parallel to themselves.

JEAN AUBE. 

